Merge core changes for 1.3 release#221

Merged

sapessi merged 37 commits intomasterfrom

Dec 26, 2018

Commits on Oct 31, 2018

Changed ContainerRequest creation to use the method for the headers. Simple add was sending to an unimplemented addNull if the list didn't already exist. Also added unit test for issue #208
sapessi
committed

Commits on Dec 16, 2018

Fixes issue where headers were treated as case sensitive after deserialization.
eirikjak
committed

Commits on Dec 18, 2018

Commits on Dec 20, 2018

Commits on Dec 22, 2018